Lovejoy 69790442711 HERCUFLEX FX Series 42711 FX 4SM Steel Rigid Hub, 20 mm Bore, 205.7 mm OD, 6 mm x 2.8 mm Keyway, 120.7 mm Length Through Bore

                The Hercuflex coupling has increase nominal torque, larger maximum bore size and longer service life. It is interchangeable with standard AGMA flange interface.